. >> these guys are important. unlike human beings, as we changetheenvironmentisbadfortheenvironment, beaversform wetlands other species could move into. he's important. >> what else does he eat besides bananas? >> in the wild he would be eating all sorts of vegetation and they like to eat tree bark. he has teeth on them that are so much enamel that are bright orange. these guys chop down trees and build dams with them. >> you don't want to get in front of an angry beaver. >> bring out the owl. >> let me put the baby alligator away. the last animal is another species that would have been -- >> what are they called? >> barn owl. these are a species native to europe. european colonists would have been used to seeing these guys. they're not particularly common. these animals can find prey in pitch darkness. >> you're kidding. >> tests have been done on these species, they've removed every iota of light. just by their hearing they can find rodents which is their main prey. they are called barn owls, because they are one of the few species that can live in human structures and benefit fr